Gabe Black has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/58490 )
Change subject: scons: Ensure the fast model license count is always at
least 1.
......................................................................
scons: Ensure the fast model license count is always at least 1.
Even though the default value for the license count is 1, it seems that
if fast model is disabled, kconfig will set it to 0. When creating a
cycle using itertools over a list with zero elements, it will raise a
StopIteration.
Even though we don't actually try to build any fast model components
in that case, we do still set them up with a license slot. If the
cycle iterator is essentially broken, that will prevent that from
working and break the build.
This change forces the license count to be at least 1, even if fast
model is disabled and the license count may be set to 0 in the config.
Change-Id: Ia8df256a8f292deb6fb6fa3c5f9a7d58c2b7f782
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58490
Reviewed-by: Andreas Sandberg <[email protected]>
Maintainer: Gabe Black <[email protected]>
Tested-by: kokoro <[email protected]>
---
M src/arch/arm/fastmodel/SConscript
1 file changed, 30 insertions(+), 1 deletion(-)
Approvals:
Andreas Sandberg: Looks good to me, approved
Gabe Black: Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/arch/arm/fastmodel/SConscript
b/src/arch/arm/fastmodel/SConscript
index 23ddb84..b8ee987 100644
--- a/src/arch/arm/fastmodel/SConscript
+++ b/src/arch/arm/fastmodel/SConscript
@@ -268,7 +268,10 @@
t[0] = t[1]
-license_count = int(env['CONF']['ARMLMD_LICENSE_COUNT'])
+# If fast model is disabled, ARMLMD_LICENSE_COUNT will be 0 which will
break
+# the cycle() iterator below. The fast model components won't be built, but
+# they still need to be set up successfully with valid license slots.
+license_count = max(int(env['CONF']['ARMLMD_LICENSE_COUNT']), 1)
arm_licenses = list((Value(object()) for i in range(license_count)))
license_cycle = cycle(arm_licenses)
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Ia8df256a8f292deb6fb6fa3c5f9a7d58c2b7f782
Gerrit-Change-Number: 58490
Gerrit-PatchSet: 3
Gerrit-Owner: Gabe Black <[email protected]>
Gerrit-Reviewer: Andreas Sandberg <[email protected]>
Gerrit-Reviewer: Earl Ou <[email protected]>
Gerrit-Reviewer: Gabe Black <[email protected]>
Gerrit-Reviewer: Jui-min Lee <[email protected]>
Gerrit-Reviewer: Sudhanshu Jha <[email protected]>
Gerrit-Reviewer: Yu-hsin Wang <[email protected]>
Gerrit-Reviewer: kokoro <[email protected]>
Gerrit-CC: Gabe Black <[email protected]>
Gerrit-MessageType: merged
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